Handles are small boxes that AutoREALM displays on selected objects. Handles show you where you can modify the object by clicking on the handle and dragging it. There are three kinds of handles that AutoREALM displays.
Ø Black solid. Standard handle used for endpoints of a line, intermediate points on polylines, control points on curves, and corners of groups, icons, or text.

Ø Black hollow. Used when handles for two consecutive objects overlap at the same point on the screen.

Ø Red hollow. Used for the four corners of the selection region. Moving these handles changes every object in the selection.